关键词: 土地质量, 地球化学, 评估, 陕西关中地区

Abstract: About 30,000 km2 in Guanzhong area had been done during the muti-target reginal geochemical survey of Shaanxi Province. The geochemical assessment of land quality in Guanzhong area was taken according to beneficial elements, harmful elements, healthy elements and pH etc. P,N,Mo,Zn,Cl,Si,Na,Cd,F,I,Se contents and pH were chosen as index of assessment, based on the oil environmental and oil fertility quality evaluation. Land of Guanzhong area was divided into five levels: high, better, good, middle and low grades. The high grade is mainly distributed in Sanyuan, Gaoling and Fengxiang, which accounts for 1.8% of the whole area; the better grade accounts for 66.1% of the whole area; the good land accounts for 11.2%, which is distributed in Qian County-Chunhua-Bin County；the middle grade is dispersedly distributed in loess rough terrain and loess plateau, which accounts for 13.9%; the low grade is mainly distributed in Dali-Hua County，Xian urban area and Tongguan,which accounts for 7% of the whole area.

Key words: land quality, geochemistry, assessment, Guanzhong area, Shaanxi Province